Representational images are prohibited in islamic art, therefore it encompasses geometric patterns that:

a. express symmetry
b. is minimally colored; shades of black and gray
c. focuses on physical form
d. expresses order and nature

I think, based on the options provided for the answers that the correct response would be (d). As a focus of producing works with the physical form was not permitted. There are a few schools of thought on the subject... one is that only god can create the physical form so to do so would be as though you are aligning yourself at gods level and his creativity. While another thought is that the figure form is not allowed due the a concern that the art might then promote idolatry which was seen as a contradiction of the oneness of God. So while some patterns express symmetry they are not minimally colored and are quite the opposite. It is thought that the geometric patterns are more representational as a reflection of God’s infinite creations and should allow for spiritual contemplation and growth... which leads me to believe (d) is the correct choice.

The period that marks the paleolithic era is between the 250,000 to 10,000 years.

Emotional appeal, plain folks, and bandwagon