Which technique is leah most clearly using in the following discussion?

leah:

she contrasts browing's writing with gothic writers like poe, who were more gloomy and grotesque.

dante:

what did he write that was so gloomy and grotesque?

leah:

the author doesn't give us any examples of poe's writing. she just says it deals with gothic subjects

a. establishing roles

b. confirming the question

c. asking clarifying questions

d. identifying missing information