Apple trees need moisture in order to thrive. A: flower B: flourish C: pollinate D: bend

Two types of pine trees share a common habitat in eastern Texas. Although both types of pine trees produce pollen at the same time, the pollen grains from one type of pine tree are not able to pollinate the ovules of the other type of pine trees. Which of the terms describes the relationship between the two types of pine trees? I. prezygotic isolationII. postzygotic isolationIII.habitat isolationIV. sympatric species A: I only B: I and IV C: II only D: II and III