How should the punctuation in this sentence be changed, if at all?

the dog's coat was matted, yet he looked very clean.

a. no change

b. the dogs coat was matted, yet he looked very clean.

c. the dogs' coat was matted, yet he looked very clean.

d. the dog's coat was matted; yet he looked very clean.

I would go with answer choice A, no change. Both B and C are incorrect because the sentence is only talking about one dog. A comma would be chosen over a semicolon because "yet" is a conjunction. Hope this helps.

The earth's inner core is the earth's innermost part. it is primarily a solid ball with a radius of about 1,220 km (760 miles), which is about 70% of the moon's radius.[1][2] it is composed of an iron–nickel alloy and some light elements. the temperature at the inner core's surface is approximately 5,700 k (5,430 °c), which is about the temperature at the surface of the sun.