How did reagan's cold war strategy change after gorbachev took power?
reagan began to focus more on military buildup.
reagan agreed to ban some nuclear missiles.
reagan recommended a return to the détente policy.
reagan took a more aggressive approach to the cold war.

The nuclear arms limitation (SALT I and SALT II) came into affect in the early and late 70s. That would make that option not possible as Reagan was elected in 1980 and Gorbachev came into power in 1985. You could argue between the detente and aggressive choices. Reagan funded anti-communist groups across the world that could be considered aggressive but not that aggressive. Later on Reagan started to consider the idea of detente and I believe that would make that the best option.

the california missions began in the late 18th century as an effort to convert native americans to catholicism and expand european territory. there were 21 missions in all, lasting from 1769 until about 1833.   the missions were built by the spanish starting in 1769 in order to “colonize” the territory of alta california. so the missions were important because they were the means of settling california. it also wanted to keep other european countries out of alta california. building settlements along the coast would them meet these goals. missionaries wanted to convert the indians to the roman catholic faith. california indians did much of the work to build missions.