What does this quote mean: within the habsburg domains, the religious question became mixed up with efforts of regional elites to attain autonomy.

It means that in lands under the sovereignty of the Habsburg house, there were efforts to gain more autonomy by local rulers,  and those political actions were justified with religious reasons or differences.

Explanation:

the correct answer is: (1) affected by gerrymandering; (2) not affected by gerrymandering.

gerrymandering is known as a practice that intends to establish a some kind of political advantage for a particular party or group. to do this district boundaries are manipulated. the new resulting district is named a gerrymandering.

in other words, what gerrymandering does is to draw the boundaries of electoral districts trying to benefit the party who is doing it. sometimes, the party controlling the legislature will redraw it so they can maximize the number of districts they are likely to control.