worst vs. worse

[Bachram]

English Error, Elementary Level

ESL/EFL Test #16 "Where are my Glasses?", question 8

It makes the whole business ten times worst because you can't see very well.

(a) whole business
(b) worst
(c) well

English Error, Elementary Level

ESL/EFL Test #16 "Where are my Glasses?", answer 8

It makes the whole business ten times worse because you can't see very well.

Correct entry: worse
The error was: (b) worst
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is it right to use worst in the sentence?

Bachram

[Mister Micawber]

.
No, the comparative 'worse' is correct.
.
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Native English teacher at Mister Micawber's