Greg does n't work in our clinic , but he works directly with it . He stops by every day , making his rounds , and often he and I chat . One day , a couple of months ago , Greg told me that " a group of people from work " were stopping off for drinks , and he invited me to join them .

Generate a question about the above context.
Why did Greg invite the narrator out to drinks after work ?
Available options:
(a). None of the above choices .
(b). He invited her out because he was interested in dating her .
(c). He wanted an opportunity to talk to her about work .
(d). He took the initiative to invite everyone directly to the event .