The Periodic Table: chemical periodicity — practice question

Which row is the correct one?

• Atemperature needed to decompose Group 2 metal nitrates decreases down the group; solubility of Group 2 sulfates decreases down the group
• Btemperature needed to decompose Group 2 metal nitrates decreases down the group; solubility of Group 2 sulfates increases down the group
• Ctemperature needed to decompose Group 2 metal nitrates increases down the group; solubility of Group 2 sulfates increases down the group
• Dtemperature needed to decompose Group 2 metal nitrates increases down the group; solubility of Group 2 sulfates decreases down the group