Which statement is an inference?
A. There are bugs in the building. Someone must have left the door open,
B. The door was open this morning and bugs were crawling indoors.
C. The door is open because someone was too lazy to close it.
D. Bugs were flying and crawling around inside this morning.

a is the right sanswer

Explanation: a is correct due to the fact that someone had to make an infrence as to why the bugs got in, so when they infrenece that the bugs had to get in somehow, therefore they concluded that someone left the door open.

Hope this helps

i guess the cause and effect would show how being around the smoke(the cause) can have negative effects on the body.

explanation:

what is the sentence?