Tests reveal that the winning athlete had taken some performance-enhancing … .

Step 1: Analyze the question The sentence is about tests revealing that an athlete took "performance-enhancing __." We need the word that best completes the phrase.

Step 2: Explain the concept This tests collocation, meaning words that naturally go together in English. The fixed expression in sports and medicine is "performance-enhancing drugs". It is used in news reports, anti-doping rules and sports commentary all over the world. This is why athletes are tested for banned substances, and why we talk about "doping."

Step 3: Work through the options

• A. drugs: Correct. It is the standard collocation. "Drugs" is a general term covering any substance used to affect the body, whatever its form.
• B. tablets: This describes a form of medication (a pressed pill). It is too specific, and "performance-enhancing tablets" is not the usual phrase. Athletes may take injections, powders or creams, not just tablets.
• C. caplets: This is also a specific form (a smooth, capsule-shaped tablet). It is too narrow and rarely used this way.
• D. capsules: This is another specific form, with powder or liquid inside a shell. It is too narrow as well.

The sentence says tests reveal the athlete took something, and that points to a general category of banned substances. Only "drugs" covers that.

Step 4: Answer The correct option is A. drugs.

Step 5: Exam tip When the options include one general word (drugs) and several specific forms (tablets, caplets, capsules), check whether the sentence needs the general idea. Also learn common collocations such as performance-enhancing drugs, banned substances and doping test. JAMB English often rewards the phrase that sounds natural.