What were the four strategies in the Civil Rights Era?

The strategy of public education, legislative lobbying, and litigation that had typified the civil rights movement during the first half of the 20th century broadened after Brown to a strategy that emphasized "direct action": boycotts, sit-ins, Freedom Rides, marches or walks,

a. because the u.s. was the leading with the most technology, economy, etc. also was teamed with other allies witch boosted the economy and materials to improve technology and use it.