Part A In "Earthships," what inference can be made about problems with building an earthship?

Relying on gutters for water could be costly.

Purchasing batteries every month could be cumbersome.

Building an earthship could be just as expensive as building a house on earth.

Floor-to-ceiling windows are needed to heat the earthship.
Question 2
Part B

Which evidence from the passage best supports the answer to Part A?

"The use of cement, which is a porous material with many small holes and spaces, allows the gases to leak into the air."

"Additionally, the cement, plumbing, and electrical components, as well as the cost of installing solar panels, can be expensive."

"Ideally, by living in an earthship, a person can have a home that is 'off the grid.'"

"Propane use can be costly, and unless one has planned far ahead, a wood supply can be quickly depleted."