Which of the following is not true concerning the impact of volcanoes? a. acid rain can result from volcanic eruptions. b. tephra are a combination of water and rubble. c. damage can continue for years after the initial eruption. d. the volcanic explosion is the pyroclastic flow. select the best answer from the choices provided

The right option is;  b. Tephra are a combination of water and rubble.

Volcanoes are vent or fissure (usually in a mountainous form) on the surface of a planet such as earth that periodically releases hot lava, volcanic ash, and gases from a magma chamber below the surface. Volcanoes can cause a lot of hazards and can damage crops and animals. Volcanoes can have prolonged effects on the climate, and weather. It can also cause acid rain, thunder and lightning.

i do not know and i have a 100 in this class

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.