Why did the author feel guilty at the sight of Margo’s words of affection?（）

Why did the author feel guilty at the sight of Margo’s words of affection?（）

A.

She had unintentionally made Margo uncomfortable.

B.

She had never communicated with Margo in such way.

C.

She pretended to be Margo’s father when chatting with her.

D.

She did not explain that it was she who was writing to Margo.

正确答案是D