What is the purpose of a thesis statement?
a. to summarize the facts and statistics introduced in the paperb. to define any vocabulary needed to understand the content of the paperc. to tell the readers of the content, the argument, and direction of the paperd. to identify the issues and prejudices that the audience connects to the paper

c

Explanation:

part a.   = c.)

part b. = a.)

explanation:

a. "to practice" is the best phrase to complete the sentence.

explanation:

during the summer, she likes to practice her soccer skills so that she is ready to play in the fall.

(note that : all the other options "the practicing of", "practice for" and "to do a practice on" are inappropriate as they make the sentence grammatically incorrect.)