Problem: How does the sentence end?

Mary can choose between her flip flops and her high heels for tonight's dinner. Since the invitation called for formal attire, she should opt for the 
Answer: high heels .

Problem: How does the sentence end?

Katrina yelled at Elena because 
Answer: Elena left muddy footprints all over the new white carpet.

Problem: How does the sentence end?

She wanted to eat some icecream but ate candy instead, because her teeth can stand warm food like the 
Answer: candy .

Problem: How does the sentence end?

If you're interested in alpha hydroxy acid for skincare, I'd recommend starting with our cream rather than our serum since the 
Answer:
cream is gentler.