Answer:
She donated several items of clothing to charity.
Step-by-step explanation:
Firstly, clothes are not particles unless we're talking science here, I'm guessing we aren't. So she isn't donating particles to charity. She wouldn't be able to give charity "bits" of clothing. Bits is a portion of something. For instance, "I would like to eat a bit of salad." So the answer should be A.
Hope this helps, I am not the greatest at explaining things. :D