Tracie, working at a research facility in washington, dc, needs to communicate with juan, who is in mexico city, about a project they are working on. although juan has perfect command of english, they are still facing a(n) barrier to communication.

physical barrier of communication

Explanation:

Physical barrier of communication -

It is the type of restriction between the communication between two people is referred to as  physical barrier of communication .

This type of restriction causes lack of information exchange , which could be due to many reasons , like no common language of communication .

Hence, from the given scenario of the question, the correct term is physical barrier of communication .

- "sack of constantinople, (april 1204). the diversion of the fourth crusade from the holy land to attack, capture, and pillage the byzantine city of constantinople divided and dissipated the efforts of the christians to maintain the war against the muslims. the fourth crusade was corrupted from its purpose early on."

- "the crusades were a series of religious wars undertaken by the latin church. the first crusade arose after a call to arms in 1095 sermons by pope urban ii. the first crusade unleashed a wave of impassioned, pious catholic fury, which was of constantinople, the capital of the christian-controlled byzantine empire."

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your answer is rising unemployment and inflation.