Which event caused some to say America was in a "post-racial" era?
O A. The election of Barack Obama
OB. The Civil Rights movement
O C. Hurricane Katrina
D. The Emancipation Proclamation

A. The election of Barack Obama

Explanation:

Post racial era refers to the United States being free from racial discrimination, segregation and preference.

Barack Obama was elected President of the United State in 2008 and was regarded as the first black president of the county. This made people to conclude that the United States has truly reached its post racial era.

angle a = 40.6°

step-by-step explanation:

for any right angle triangle we know the pythagoras theorem reveals

hypotenuse² = height²+base²

by this formula we will calculate the length of hypotenuse

h² = 6²+7²

⇒ h =√36+49 = √85 = 9.22

now from the given triangle sin a = height/ hypotenuse

                                                sin a = 6/9.22 = 0.651

therefore

so angle a = 40.6°

hitler was elected as a strong leader by germans who felt angry following the treaty of versailles.