help please (ty to the people who know this) :)

Answer:
C) [tex]3c-5d[/tex]
Step-by-step explanation:
[tex]-c+5d+7c-11d+d-3c[/tex]
Group the similar terms together:
[tex]-c+7c-3c+5d-11d+d[/tex]
Add/subtract the "c" variables:
[tex]3c+5d-11d+d[/tex]
Add/subtract the "d" variables:
[tex]3c-5d[/tex]