The first pressure group, the Cameroon Welfare Union (CWU), in British Cameroon during the Mandate period was formed by ...

Here are the answers to the questions from the image:

13. A. P.M. Kale
The Cameroon Welfare Union (CWU), the first pressure group in British Cameroon during the Mandate period, was formed by P.M. Kale.

14. A. Promote the economic exploitation of French Cameroon
The main objective of the French policy of "La Mise en Valeur" (putting to good use) was primarily to promote the economic exploitation of French Cameroon for the benefit of France.

15. A. The rise of Southern Cameroonian nationalism
While nationalism did rise after WWII, the other options (Southern Cameroons becoming a UN Trust Territory, acquiring quasi-regional status, and the creation of the CDC)