How did Pakistan's strategic alignment with the United States primarily transform following the events of September 11, 2001?

The correct answer to the question "How did Pakistan's strategic alignment with the United States primarily transform following the events of September 11, 2001?" is Option B: Pakistan became a key non-NATO ally in the US-led War on Terror..

The other options — A) Pakistan severed all diplomatic ties with Afghanistan., C) Pakistan officially joined the North Atlantic Treaty Organization (NATO)., D) Pakistan imposed economic sanctions on the United States. — are incorrect for this Pakistan Affairs question. As explained above: After the 9/11 attacks, Pakistan became a crucial frontline ally for the United States in its War on Terror, leading to significant military and economic assistance and the designation as a major non…