Which correctly punctuates an introductory element?

a) outside the house in the yard we saw a dog chasing our cat.

b)in room 210 there are 3 boys and 17 girls.

c)no we do not want to go!

d)on bus 18, there is a kind man named mr. cantucci.

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(1) fire extended humans’ geographical boundaries by allowing them to travel into regions that were previously too cold to explore. (2) it also kept predators away, allowing early humans to sleep securely. (3) fire, in fact, has been a significant factor in human development and progress in many ways. (4) other obvious benefits of fire are its uses in cooking and in hunting. (5) probably even more important, however, is that learning to control fire allowed people to change the very rhythm of their lives. (6) before fire, the human daily cycle coincided with the rising and setting of the sun. (7) with fire, though, humans gained time to think and talk about the day’s events and to prepare strategies for coping with tomorrow. the sentence that expresses the main idea is: (type the number of the sentence. then click “go.”)

What point of view is expressed by judith sargent murray in her essay "on the equality of the sexes"?