<p>I know this one is either A or B:</p>
<li><p>When Sandra felt she could endure Harvey’s banter no longer, she faded into the crowd, [while Harvey, oblivious to her departure, jabbered on.]
A. same as above
B. Harvey, oblivious to her departure, jabbered on</p></li>
<li><p>[If not] in [good] physical condition, a bicycle excursion through the countryside [can be] [painfully exhausting]. [No error]</p></li>
<li><p>[Setting herself] up [as] a preserver of the Classical tradition, Clara Schumann was an [outspoken] [critic toward] Romantic composer Franz Liszt. [No error].</p></li>
</ol>
<p>(^should it be critic of?)</p>
<li><p>[Such a] bold stroke would transform the city’s two railroad terminals [into] through stations [and might also] be the signal for competing railroads [to work as] a team. [No error]</p></li>
<li><p>[When looking] at modern photographs of that area of Indonesia, the effects of the 1883 [eruption of] the volcano Krakatau [are] [still evident]. [No error]</p></li>
</ol>