Answer:
A. celebren, conozcan
Explanation:
No pienso que mis padres celebren y conozcan el origen de esta festividad.
What's the question?
This weekend, they premiere a science fiction movie.
Answer: correct
Esta piña es mi piña.
This pineapple is my pineapple.
Explanation: "Esta" is a demonstrative adjective and "mi" is a possessive adjective.
what? im confused