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What two instruments made navigation much easier in the 1900s?

A.) Global Positioning Satellite (GPS) and two-way radio
B.) The chronometer and the astrolab
C.) The cross-staff and the compass
D.) The chronometer and the compass

Respuesta :

Answer: A. Global Positioning Satellite (GPS) and two-way radio

The two instruments that were used and that were made navigation convenient and easier in 1990s are the GPS and the two-way radio. GPS is a tracking system using Global Navigation Satellite System. 

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