Consider the plot of $Z$ against $P$ for a real gas at a fixed temperature $T$ that is below its Boyle temperature. Which statements are correct?

Every gas approaches ideal behaviour as $P\to 0$, so $Z\to 1$ (A true). Below the Boyle temperature attractions dominate at low pressure, so $Z$ first falls, giving a negative initial slope (B true). At high pressure the excluded volume term dominates and $Z\approx 1+Pb/RT$, which rises linearly (C true). The crossing pressure where $Z$ returns to 1 depends on $T$ because the attraction term $a/RT$ changes with $T$ (D false).