Question

in this conversation, which group discussion technique does emily most clearly show? emily: wait, wait, wait..... that totally destroys the books credibility! if medieval masterpieces by francis eggbert is fiction, and pettit is using it as a source, then that means pettits assumptions are probably inaccurate. han: got that right. and eggert is a famous historian. hes even got a show on the radio. a. conducting extra research b. determining new research goals c. asking clarifying questions d. challenging the credibility of sources

Explanation:

Emily points out that if the book Medieval Masterpieces is fiction and being used as a source, it undermines the credibility of Pettit's assumptions. This shows she is challenging the credibility of the source.

Answer:

D. Challenging the credibility of sources