Question

Learning a new language as an adult is more difficult than to learn one as a child.

Underline word is to learn

A learning

B learned

C to learning

D no change

Answer 1

I think A. Learning is correct because it means you are in progress of learning something new.

Answer 2

A. Learning

Step-by-step explanation:

The sentence should be, "Learning a new language as an adult is more difficult than learning one as a child."