Some may argue that learning another language is difficult, and they are probably right. But there are more advantages that make the effort worth it.
Why does the author include these sentences?
A to address an opposing view about the benefits of learning another language
B. to persuade others that the benefits of learning another language is job security
C to show that learning another language requires hard work and determination
D to suggest that not everyone has the ability of learning to speak another language

to address an opposing view about the benefits of learning another language.

Explanation:

The sentences were included by the author so that the opposing view about the benefits of learning another language can be addressed.

This can be seen when the author began by pointing out that "some may argue that learning another language is difficult", therefore, in this case the author is addressing a opposing view so as to show them the advantages that comes with learning another language.

what of the following? i don't know about you but i see no multiple choice answers.