(A)

No. 11

1 It focused only on Internet-based relationships.

2 It was funded by an Internet company.

3 The researchers used outdated technology.

4 The length of the study was inadequate.

No. 12

1 They tend to misuse data from people’s profiles.

2 They often ignore factors related to compatibility.

3 They may contribute to creating strong marriages.

4 They have simplified their algorithms recently.