I think Its B just for sum point thought just ignore this
Let's read the text again...
My grandfather the fisherman always told me that the best way to communicate with fish is to drop them a line.
There are three phrases that help us to understand the pun in the text: The grandfather is a fisherman, it means his job is to catch fish, by communicate he means to make the fish come closer, and by drop them a line he means the fishing rod thread.
Taking the above into account the correct answers are:
A.“communicate” and “drop them a line”
B.The pun plays on a phrase that means both to send a note and to attempt to catch a fish.
I believe "You will eat lunch / at school / with friends" most clearly develops an argumentative tone because of the 'will'. Sounds like someone's trying to force the person to do that and the person may try to argue back because the will makes it sound like they have no choice in the matter.