Answer:
the first one. “The primary functions of the spleen are to filter blood and to serve as part of the immune system.”
Explanation:
Answer:
The correct answer is "D"
Explanation:
Simply the reasoning that you can't hear books, THEY DON'T TALK TO YOU!
My last answer was deleted for being pointless, but I had to add more letters for the correct, succinct answer to be published. The right answer is "a sentence".