Which of the following is a true statement?(1 point) Water only shapes landforms above ground. Water shapes landforms by weathering, erosion, and deposition. Water shapes landforms by either erosion or deposition. Water shapes landforms by dissolving rocks. you get 30 points pls help

Which of the following processes within viral replication is the greatest source of genetic variation in rna virus populations? a) high mutation rate due to lack of proofreading of rna genome replication errors. b) transcription from the host cell rna polymerase introduces numerous mutations. c) capsid proteins from the host cell can replace the viral capsid. d) viral rna is translated by host cell ribosomes.