Which of the revisions below is the most appropriate way to correct the following sentence fragment?
jacquie doesn't travel very much. because she is afraid of flying.
a. jacquie doesn't travel very much because she is afraid of flying.
b. jacquie doesn't travel very much, afraid of flying.
c. jacquie doesn't travel very much; because she is afraid of flying.
d. jacquie doesn't travel very much, she is afraid of flying.