Allison has written and rewritten the central idea of her speech on the topic of dog care. She finally comes up with "Dog care is very difficult." What is the problem with this central idea?A) Her central idea is not audience-centered.
B) Her central idea is too confusing.
C) Her central idea is too vague and does not restrain the number of main points.
D) Her central idea is not a declarative sentence.

c. Her central idea is too vague and does not restrain the number of main points.

Explanation: A good central idea of a speech should strong,clear and specific.

Allison has made us know that dog care is difficult whereas hasn't even made mention of how dogs can be taken care of or the best way to take care of dogs. Making the central idea vague and main points lost.

the correct answer is the following is a list of inventions made in the medieval islamic world, especially during the "islamic golden age" (8th to 13th centuries),[1][2] as well as the late medieval period, especially in the emirate of granada and the ottoman empire.

science and technology in the islamic world adopted and preserved knowledge and technologies from contemporary and earlier civilizations, including persia, india, china, and greece-roman antiquity, while making a number of improvements and innovations.