<p>Access to the laboratory facilities is <u><b>strictly</b></u> limited to authorized staff.</p>
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<p>The correct answer is (<b>C) strictly</b>.</p>
<p>The word "limited" indicates that there are restrictions on who can access the laboratory facilities. The word "strictly" means that these restrictions are enforced rigorously and without exception.</p>
<p>(A) "considerably" means to a great extent or significantly. This does not fit the context of the sentence, as it suggests that access is not restricted.</p>
<p>(B) "rapidly" means quickly. This does not make sense in the context of the sentence, as it does not describe the level of restriction on access.</p>
<p>(D) "readily" means easily or without difficulty. This also does not fit the context, as it suggests that access is not restricted.</p>
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