a)the equipment produces more power?
b)the equipment uses less energy?
c) less current is used?
d)less voltage is needed?

Were you asleep during class? Or too lazy to read the material that explains the answer?

No I wasn't giving the information to the questions I'm asking my tutor said he would email me and he never and the exam is tomorrow I've tried looking up things in books an internet but to no avail

When parallel units are operated at designed power factor, generators' reactive load is balanced. This reduces circulating currents and improves efficiency.

Try :Power factor correction - Wikipedia, the free encyclopedia.

Again you will learn more than just the answer you are seeking.