Which of the following led to the successful protection of richmond from mcclellan? a- the superior number of confederate forces b- geographic obstacles c- use of modern weaponry d- the people stood against the attack.

The correct option is option A. The superior number of Confederate forces. On June 20, Lee launched a surprise attack against McClellan, and for seven days pushed the Union forces back. McClellan established a new base on the James River and still had a good position for an attack on Richmond.

The answer is B.

Here is proof from the section.

(the Confederates caught and attacked part of McClellan's force separated from the main army by the flooded Chickahominy River.)

Because of the flood, part of their group separated from the main group and a flood is a Geographic obstacle

the berlin blockade was an international crisis that arose from an attempt by the soviet union, in 1948–49, to force the western allied powers (the united states, the united kingdom, and france) to abandon their post-world war ii jurisdictions in west berlin. in march 1948 the allied powers decided to unite their different occupation zones of germany into a single economic unit. in protest, the soviet representative withdrew from the allied control council. coincident with the introduction of a new deutsche mark in west berlin (as throughout west germany), which the soviets regarded as a violation of agreements with the allies, the soviet occupation forces in eastern germany began a blockade of all rail, road, and water communications between berlin and the west. on june 24 the soviets announced that the four-power administration of berlin had ceased and that the allies no longer had any rights there.