Which tells when things are due and the timeframe for working on the project? the chosen goals
the schedule
the research method
the requirements

Lets work through them first:

The goals tell you what you want to accomplish overall, not when you need it done so it doesn't work

the research method tells you how you need to do a project

The requirements are similar to the goals. The only difference is the requirement are the bottom line, meaning you HAVE to have these to finish.

The schedule tells you when things will happen or end so it would be your answer

B. Schedule

hi,   i believe the outlines that were supposed to be showing at the sentences, are not. could you highlight them somehow?

the pronoun reference replaces a noun, but you have to make sure there's no room for confusion.

in the first sentence "her" could be referring to shely or to the sister. the answer there is "shelly called her sister and told her about the new baby."

in the second sentence "it" could be referring to the roof or the floor. the answer there is "since the roof leaks on the family room floor, we need to repair the roof."