Question

pronoun - pronoun agreement
to become a world - class tennis player
one must practice on a daily basis in
order that you become an expert.
a. no change
b. they
c. you
d. all

Explanation:

The sentence has a pronoun - pronoun agreement error. The subject - pronoun "one" should be consistent with the other pronoun in the sentence. If we use "one" as the subject - pronoun, the subsequent pronoun should also be "one", but among the given options, to make the pronoun agreement correct, we should use "you" to be consistent in the context of the sentence structure (the sentence is structured in a way that using "you" for both parts makes the pronoun agreement correct as "one" and "you" are inconsistent, so we need to make them consistent by changing "one" to "you" or vice - versa, and here changing "one" to "you" is the option given as C).

Answer:

C. you