Answer:
Tienen
Explanation:
Uzjdkdjdjdndhdjdjjdjdjejd
Its D because apparently I'm wrong
The correct choice to fill the blank and complete the sentence is, eras.
En ese tiempo tú eras un niño pequeño.
I recommend Duolingo (an app) for starters, if you’re in high school you can ask your counselors to put you in a Spanish class. Taking trips to Mexico (if you can afford it) can also help! Good luck!