Read the following excerpt from chapter 6 of Jack London's The Call of the Wild. Then, answer the question that follows.
This man had saved his life, which was something; but, further, he was the ideal master. Other men saw to the welfare of their dogs from a sense of duty and business expediency; he saw to the welfare of his as if they were his own children, because he could not help it.
London, Jack. The Call of the Wild. Macmillan, 1903.
Which tense is the primary tense of this passage?
a. past progressive
b. past simple
c. past perfect
d. present simple