Answer:
C. That loners are social people deep down but need help
Explanation:
The last line of the summary, "Over time, Wei taught Allen how to be more social and enjoy life." shows that Allen needed some help which was provided by Wei. Hence, option C is correct.
Option A is incorrect because the author uses no negative words for partying.
Option B is totally incorrect because there is no mention of hard work and respect among the colleagues. The summary's focus is social partying/socialization and being by oneself.
Option D is incorrect because the setting of technology firm is not much important. Furthermore, they are parting after office time, so no question of showing employees having a lot of free time.