Option A is incorrect. 'give' is in the simple present form. However, The auxiliary 'are' is also in the simple present form and according to the rules of usage, when the auxiliary of a verb is in the present tense, the main verb must be in its past participle form. Thus, it is grammatically incorrect.
Option B is incorrect. 'gives' is in the simple present form. However, The auxiliary 'are' is also in the simple present form and according to the rules of usage, when the auxiliary of a verb is in the present tense, the main verb must be in its past participle form. Also 'gives' is only used for singular nouns or singular third person pronouns. Thus, it is grammatically incorrect.
Option C is correct. 'given' is in its past participle form. Thus, the tense of the main verb 'are given' will be simple present. Thus, it states the fact and is the correct answer.
Option D is incorrect. 'giving' will make the main verb's tense present continuous. Thus, it will state an ongoing action and not a fact. Further, 'packages are giving special care' would mean that the packages are carrying out the action. This will change the meaning of the sentence and thus, is incorrect.