Please help this is my second time asking this! Please!!! Look at the picture down below to answer the question!
>>Select the 2 that apply.
Q: An unsaturated hydrocarbon is represented by which structural formula(s)?
>>Choose two from the picture below that matches with the question above!
Is it

A
B
C
D

is there any options? maybe im just not seeing them but i need the options to

-love shrooms

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.