A study was undertaken to determine the effect of three environmental factors (humidity (H), temperature (T), air pressure(AP)) on the nitrogen oxide (NO) content of the exhaust emissions of diesel trucks. Consider the correlation matrix below. // 'n Studie is onderneem om die effek van drie omgewingsfaktore (humiditeit (H), temperatur (T), lugdruk (AP)) op die stikstofoksiedinhoud (NO) van die uitlaatgas van dieseltrokke vas te stel. Beskou die korrelasiematriks hieronder. AP H T NO AP 1 0.612 0.212 0.604 H 0.612 1 0.004 0.559 T 0.212 0.004 0.406 NO 0.604 0.559 0.406 1 Which independent variable is most weakly correlated with the dependent variable? // Watter onafhanklike veranderlike is die swakste gekorreleer met die afhanklike veranderlike? Select one: a. Air pressure (AP) // Lugdruk (AP) b. Humidity (H) // humiditeit (H) c. Temperature (T) // Temperatur (T) d. Nitrogen oxide (NO) // Stikstofoksiedinhoud (NO)