Unfortunately, the research was limited __________ increasing economic profits, _________ protecting the environment.

  A. to; other than        B. by; rather than   C. to; rather than    D. by; more than

 Unfortunately, the research was limited __________ increasing economic profits, _________ protecting the environment.

  A. to; other than        B. by; rather than   C. to; rather than    D. by; more than

Unfortunately, the research was limited __________ increasing economic profits, _________ protecting the environment.

1. A.
   to; other than
2. B.
   by; rather than
3. C.
   to; rather than
4. D.
   by; more than

Unfortunately, the research was limited __________ increasing economic profits, _________ protecting the environment.

Unfortunately, the research was limited __________ increasing economic profits, _________ protecting the environment.