Choose the right preposition to complete the sentence. I'm look. ........my granny, so I...

Question

Choose the right preposition to complete the sentence.
I'm look. ........my granny, so I will not arrive this month.
a) at
b) after
B) Up
Г) for

Answer 1

I'm looking  .... my granny, so I will not arrive this month. b) after

Answer 2

B) after
но тут раз уж am, то и не look, a looking должно быть
т.е. I'm looking after my granny, so I will not arrive this month.