Final answer:
The highest degree of comparison for adjectives and adverbs is the superlative degree, which is used to express the highest level of quality among three or more items.
Step-by-step explanation:
In grammar, adjectives and adverbs have three degrees of comparison: positive, comparative, and superlative. The positive degree is the base form of the adjective or adverb, simply describing a noun or action, without any comparison. The comparative degree compares two things, usually formed by adding '-er' to the adjective or adverb or using the word 'more' before it. The superlative degree expresses the highest or most extreme level of quality among three or more items and is usually formed by adding '-est' to the adjective or adverb or using the word 'most' before it. Therefore, the answer to the question is c) Superlative.
For example:
- Positive: This is a fast car.
- Comparative: This car is faster than that one.
- Superlative: This is the fastest car in the showroom.