In option (a), the verb that follows the verb 'is' has to be either in continuous form (V4) or past participle form (V3) alone. The verb 'deny' is in the base form (V1) and that is the error. Instead the 'ing' form of verb 'denying' is to be used.
In option (c) the uncountable noun 'evidence' is followed by the plural verb 'are', which is incorrect. Uncountable nouns are always followed by a singular verb. So, 'is' is to be used in the place of 'are'.
In option (d), the third person singular form (V5) of the verb 'recommends' is incorrectly used next to the first person singular noun 'I'. Whenever first person singular noun is used, the verb has to be only in base form of the verb (V1). Instead of 'recommends', 'recommend' is to be used.
Option (b), is the sentence that is grammatically and contextually correct without any errors.
Hence, the correct answer is option (b).
Note:
Countable and uncountable nouns: 1. Countable nouns are the class of nouns that can be counted, for example, 'table' - one table, two tables, three tables, etc. 2. Uncountable nouns are the nouns that cannot be counted or usually are not counted, for example, light, water, milk, information, furniture, etc. They do not generally have a plural form and can't be preceded by 'a' or 'an'. Many abstract nouns are typically uncountable. Some uncountable nouns can be used in the plural as well, depending on the meaning or context of the word.
V1 -> Base form/simple form of verb, V2 -> Past form of verb (-ed form or irregular verb), V3 -> Past participle form of verb (-ed, -d, -t, -en, or -n), V4 -> Continuous form of verb / Present participle form of verb (-ing form), V5 -> Third person singular (V1+ -es or -s).
Study Notes
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