Read the following context and choose the best option to answer the question.
Context: When I was in Kenya , I got down to an anemic and unattractive 155 lbs . That was admittedly too skinny . But last weekend , while cat sitting for a friend with an electronic scale , I stepped on ( fully clothed ) to see a rather unexpected number : 206 .
Question: Why were they at their friend 's house ?
Options: 
A. they were taking care of the cat
B. they were watching the dog
C. to use their fancy scale
D. None of the above choices .


A