Read the sentences below. The new safety requirements were enacted based on scientists’ recommendations. Fewer accidents occurred.

Which combines the sentences to create one complex sentence?

The new safety requirements were enacted based on scientists’ recommendations; fewer accidents occurred.
Based on the scientists’ recommendations, the new safety requirements were enacted, and fewer accidents occurred.
Based on the scientists’ recommendations, the new safety requirements were enacted so that fewer accidents occurred.
The new safety requirements were enacted based on scientists’ recommendations, and fewer accidents occurred.

The red badge of courage documents henry's growth and maturity as a soldier through the changes in his personality and behavior. during this transition, henry's emotions run the gamut from glory to fear to depression to anger to exhilaration to courage to honor. his personality and behavior move from innocence to experience, in essence from doubt to duty. henry's maturing process occurs very quickly. in the span of just a few days, henry experiences a lifetime's worth of growth — from his enlisting for self-centered reasons of glory, to the exhilaration of his first battle, to his running from his second battle for fear of being killed, and, ultimately, to his facing the enemy and leading a charge as he becomes one of the bravest soldiers in his regiment. several examples from the novel illuminate the changes which take place in henry's character and in their relationship to the themes of doubt and duty.