El cacharro es el coche deportivo. más bonito que más feo que más rápido que más rápida que

The correct comparison that can be used in the sentence is:

- El cacharro es más feo que el coche deportivo.

Explanation:

The translation of the sentence is:

- The bone shaker is uglier than the sports car.

In Spanish it is usually called "cacharro" to a car that is in very bad condition, meanwhile, sports cars are extremely fast and modern high-gamma vehicles.

In all options is used the superiority comparison "más - que", which is used to mention that the first noun mentioned is better in some characteristic than the second, but since the first noun is "cacharro", There are few good characteristics that you will have in front of a sports car, unless they are adjectives that reflect bad characteristics, and since the only bad characteristic is "feo", This is the only possible option to complete the sentence.

I leave you two images: the first of a "cacharro" and the second of a sports car so that you judge yourself which is uglier.

c. its asking which of the words need an accent mark. its spelled biografía