Answer:
c. He needed to resolve the problem of opposing forces, that Thales' philosophy faced.
Explanation:
Apeiron which is a Greek word and literally means, boundless, infinite or limitless.
According to Anaximander, one of the Greek philosopher, in trying to explain the apeiron, he suggested that, apeiron which is infinite in nature, can not be restricted by having qualities that can be opposed, as Thale philosophy tried to attributes apeiron to Infinite source which he described as Water.
However, Anaximander believed that, Water has opposing force in fire, which is a problem to the philosophy of Thale.
Hence, Anaximander suggested that apeiron has no qualities or form, and cannot be either Water, or Fire.