1. Which is the best version of the underlined portion of sentence 5 (reproduced below)? Compounding the problem is that food distribution system's currently require a lot of energy.
Answer: C
Compounding the problem is that food distribution system's currently require a lot of energy.
The best version of the underlined portion is "system's," which indicates possession, suggesting that the energy requirement belongs to the food distribution system.
A) (as it is now)
This option retains the original wording, which incorrectly uses "system's" in a possessive form that should not be there. The sentence lacks grammatical correctness and clarity in conveying the intended meaning about the food distribution systems.
B) systems
This choice incorrectly pluralizes "system" without the possessive form, which does not convey that the energy requirement is specifically attributed to the food distribution systems. The absence of possession alters the intended meaning of the sentence.
C) systems's
This option incorrectly adds an additional possessive marker to "systems," which is grammatically incorrect. The correct form should simply be "system's," referring to the energy requirement of a single food distribution system.
D) systems
Similar to choice B, this option pluralizes "system," losing the possessive aspect necessary for the sentence to clearly communicate that the energy requirement pertains to the food distribution system as a whole.
Conclusion
The correct choice is "system's," as it appropriately indicates possession and maintains the clarity of the sentence. All other options fail to convey the necessary meaning regarding the energy requirements of the food distribution system, resulting in grammatical errors or misinterpretation of the original context.