In which sentence is the word fighting used as a gerund?

a. a fighting spirit permeated the fire station.

b fighting fatigue can make a dangerous job more hazardous.

c the crew members are fighting the fire.

d in general, fighting does not solve problems.

If the four main points of this informational speech were changed 1. part-time job interviews ii. summer job interviews iii. college entrance interviews iv. full-time job interviews organization type would change from a. topical, cause-effect b. chronological, topical c. spatial, chronological d. cause-effect, spatial