Which revision eliminates the vague pronoun reference in the sentence below?

Some resorts offer camps for children, flexible meal schedules, and free childcare. These are important for vacationing families.

A- Some resorts offer camps for children, flexible meal schedules, and free childcare. Those are important for vacationing families.

B- Some resorts offer camps for children, flexible meal schedules, and free childcare. That is important for vacationing families.

C- Some resorts offer camps for children, flexible meal schedules, and free childcare. These extras are important for vacationing families.

D-Some resorts offer camps for children, flexible meal schedules, and free childcare. This is important for vacationing families.