The correct option is B All of these features
The mere use "these" does not include all the characteristics of the impressionist movement and might refer to something else other than intended. Therefore "All of these features" must be used to clarify which nouns are being substituted. Also, the features being inanimate, no personal pronoun can be used. Hence, Option B is correct. The rest of the options do not adhere to this rule, hence, incorrect.