It looks like you overlooked the provided image necessary to address this inquiry. Nevertheless, I found it and have the solution. Referring to the topographical map of a segment of Charleston, SC, the feature located at the spot marked with an X represents the peak of a hill. The correct answer is option D.
The reaction that exhibits the lowest K value is:
A + B → 2 C; E°cell = -0.030 V.
This can be rationalized by noting that the standard electrode potential of the cell is directly proportional to the reaction's equilibrium constant. A higher potential results in a larger K value, whereas a lower potential yields a smaller K value.
The order of compounds from the slowest to the fastest rate of hydration is 5, 3, 4, 1, 2.