She would consider your reasoning inadequate. She’s looking for a scriptural basis upon which the Church’s position is founded.
It’s not a problem for me - I still remember serving as an alter boy when it was ‘Host Only’; I went to Catholic School and they at least managed to teach me that much. “Body Blood Soul and Divinity” as you say.
I have never encountered a Catholic Tradition which was not ultimately based on evidence found in The Bible. This is the first time I was unable to quickly point out 4 or 5 places to make the case. Now I think I have that scriptural basis. Thanks to all of you.
NAB—John 6
So they said to him, “What sign can you do, that we may see and believe in you? What can you do?
31
16 Our ancestors ate manna in the desert, as it is written: ‘He gave them bread from heaven to eat.’”
32
So Jesus said to them, “Amen, amen, I say to you, it was not Moses who gave the bread from heaven;
my Father gives you the true bread from heaven.
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For the bread of God is that which comes down from heaven and gives life to the world.”
34
So they said to him, “Sir, give us this bread always.”
35
17 Jesus said to them,
"I am the bread of life; whoever comes to me will never hunger, and whoever believes in me will never thirst.
36
But I told you that although you have seen (me), you do not believe.
3
The Jews murmured about him because he said,
"I am the bread that came down from heaven,"
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and they said, “Is this not Jesus, the son of Joseph? Do we not know his father and mother? Then how can he say, ‘I have come down from heaven’?”
43
Jesus answered and said to them, "Stop murmuring among yourselves.
44
47
Amen, amen, I say to you, whoever believes has eternal life.
48
I am the bread of life.
49
Your ancestors ate the manna in the desert, but they died;
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this is the bread that comes down from heaven so that one may eat it and not die.
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I am the living bread that came down from heaven; whoever eats this bread will live forever; and the bread that I will give is my flesh for the life of the world."
52
The Jews quarreled among themselves, saying,
"How can this man give us (his) flesh to eat?"