The correct answer is "true."
It is true that n addition to the early civilizations of Mesopotamia, Egypt, the Indus Valley, and China's Yellow River, archeologists have discovered two other centers of civilization in Peru and in Central Asia.
Yes, archeologists have continued to do research and excavations and have found new archeological sites that make them think that there were other ancient civilizations.
That is the case of the archeological site BMAC or Bactria-Margiana site, located in what today is Afghanistan. This site is considered to be from the Bronze Age and is dated approximately 2450.1850 BC. Historians and archeologists agreed that this could be the region of the Oxus civilization.
In the case of Peru, archeologists have found evidence of what could probably be the oldest civilization in South America; the Caral civilization on the coast of northern Peru, in the region of Vichama, 70 miles North Lima the capital city of Peru. This civilization could have existed approximately4000 years ago.