En el club de fotografía, fotografía como fotografos. a. mas b. menos c. tantos d. tantas

D. Tantas

Explanation:

I'll suppose you meant to write "fotógrafas" (female photographers) instead of "fotografía" (photo), because that would make much more sense.

En el club de fotografía, hay _TANTAS__ fotógrafas como fotógrafos.

(In the photo club, there are as many female photographers as male photographers)

We're dealing with a comparison here, the most common forms of comparison are when one quantity is lower/higher than another, then we use "más... que"/"menos... que" ("more/less... than") or when two quantities are equal then we use "tanto... como"/"tan... como" ("as many... as").  

In the case of "tanto", it has to be modified to match the name it refers to (in this case 'fotógrafas", feminine plural, 'tanto' becomes 'tantas').

google translate is the way to go, sorry i cant you but its a trusted resource to use