In the following sentence the highlighted part contains an error. Alternatives to the highlighted part are given as options. Select the correct alternative.
"I want to buy the less expensive bike, but with the best mileage."

Correct option is C

The correct replacement is (c) "least."
Explanation:
The sentence says: "I want to buy the less expensive bike, but with the best mileage."
Here, we are using “the best mileage,” which is in the superlative degree.
To maintain parallel structure (i.e., consistency in degree of comparison), “less expensive” should also be in the superlative degree.
Hence, the correct phrase is “the least expensive bike”, not “the less expensive bike”.