How did peter the great expand russia’s borders?
a. he gained control of a warm-water port along the black sea and defeated the vast ottoman empire, taking over their lands.
b. he gained control of poland and took over parts of austria in a petition signed by peter, frederick the great, and emperor joseph ii.
c. he defeated the swedes to gain control of the land along the baltic sea, and he signed a treaty with china to gain rights to lands north of manchuria.
d.