We had no doubt about the sufficiency of our grains to see us through the rainy season.

Step 1: Analyze the question The underlined word is "sufficiency" (the underlining is lost in the text, but the word being tested is clearly sufficiency, since the sentence talks about grains lasting through the rainy season). We need the option closest in meaning.

Step 2: Explain the concept "Sufficiency" comes from "sufficient", meaning enough. Sufficiency is the state of having enough of something for a need.

Step 3: Check each option

• A. Accuracy: correctness or exactness. It does not fit grains lasting a season.
• B. Adequacy: the state of being enough or satisfactory for a purpose. This matches "sufficiency" closely.
• C. Availability: being present or obtainable. It says the grains exist, not that they are enough.
• D. Efficacy: the ability to produce a desired effect, usually used for medicine or methods.
• E. Efficiency: working well with little waste. It does not concern quantity.

Step 4: Substitute into the sentence "We had no doubt about the adequacy of our grains to see us through the rainy season." This keeps the original meaning: we were sure we had enough grain.

Answer: B. adequacy

Tip: In synonym questions, replace the word with each option and see which keeps the sentence meaning unchanged. Also watch for look-alike words such as efficacy and efficiency, which resemble "sufficiency" in sound but not in meaning. Link "sufficient = enough = adequate."