gwd 4-30

Q30:

Under high pressure and intense heat, graphite, the most stable form of pure carbon, changes into the substance commonly referred to as diamond and remaining this way whether or not the heat and pressure are removed.

1. remaining this way whether or not
2. remaining like that even as
3. remaining as such whether or not
4. remains in this way although
5. remains thus even when

answer d

能解释下 changes into the substance commonly referred to as diamond and remains in this way althoughthe heat and pressure are removed。 的意思？

变成通常所谓的钻石，即使解除了温度和压力也还会保持这样的状态。