Which of the following sentences is right in grammar?

1. A.
   If these things develop, jobs will be created for people, allowing them to help themselves instead of dependent on other people．
2. B.
   Such students are returning because they’re contracted to work for their sponsors on completing their education．
3. C.
   Alternative energy can be used without being running out．
4. D.
   People my age prefer staying warm inside with a cup of cocoa to wander the street in the cold weather．