Which sentence best refutes the critics’ concerns about online education?

A.After viewing an interactive video about the electromagnetic spectrum, she joins a couple of her classmates in an online chat room to complete a virtual lab assignment that they will e-mail to the instructor.

B.Enrollment in these courses also allows students access to virtual laboratories and the finest libraries in the country, no matter where they live.

C.Thanks to current technology, Samantha is just one of many students who have benefited from online learning.

D.In fact, Florida Virtual School, the nation’s largest virtual high school, boasts higher scores in its advanced-placement courses than many traditional public schools.