Answer:
It helps you understand English and communication
Explanation:
A is correct that is wat i think the answere is
I don't know what text you're talking about, but I believe the answer would be C. "fifteen designs"
A can be changed to "Memorial mission" or something.
B can be changed to "Pretty structure" or something.
D can be changed to " Available leasing area".
C will always need fifteen, as that's a prime word, it's needed to explain something. If you change that word, it'll change everything else.
Your answer here would be "However"
So, option D is your answer.
Hope this helps!