It's describing the chica, which is singular and also feminine, so therefore we must use la.
Answer: C. su
Sentence: Donde esta <u>su</u> ¿profesora?
Are you asking for a verb or is there some sort of word bank???
Answer:
1-Invertieramos-ahorremos
2-esten
3-que revisemos-que nos mantuvieramos
4- contraté
5-decidieran
6- que notemos
7-se preocuparan- se enfoquen
8-sean-que hicieramos
9-facilite el proceso-nos prestarán
10-ganaramos-