It could be A or C because the geography affects economic activity depending on if you are landlocked and on the climate
The first one =the Moskva river
Plains<span> occur as lowlands along the bottoms of </span>valleys<span> or on the doorsteps of mountains, as coastal </span>plains<span>, and as plateaus or uplands. In a </span>valley<span>, a </span>plain<span> is enclosed on two sides but in other cases a </span>plain<span> may be delineated by a complete or partial ring of hills, by mountains or cliffs.</span>
Magma that is low in silicon produces a quiet volcanic eruption.
Jagged coastline and rocky soil