In a paragraph, which is the main idea?

Yesterday, I got new umbrell, It has a light blue design and red flower. My umbrella is nice and beautiful. The handle of my umbrella is yellow. On the side, there is a print of my name. I do like it.

A. A blue design
B. A new umbrella
C. A print of my name
D. A red flower

please po pa help
salamat po​