The plural form of el borrador is <span> los borradores</span>
12. Tanta, como
13. Tan, como
14. Tantas, como
15. Tan, como
It’s A.
B is incorrect because it says days, not hours.
C is incorrect because it says “going to wait”, not “have been waiting”.
D is incorrect because it is not present progressive, it is just simple present tense.