The hiking club climbed up 522 feet on monday and 365 feet on tuesday. hayley said that the hiking club climbed up 887 feet altogether.

which expression can be used to check hayley’s answer? is hayley correct?

a.
887 – 522
hayley is correct.

b.
887 – 522
hayley is not correct.

c.
887 + 522
hayley is not correct

d.
887 + 522
hayley is correct.