Which of the following is the main cause of global warming
a. rising sea levels
b. increase in solar radiation
c. release of chlorofluorocarbons into the atmosphere
d. buildup of carbon dioxide in the atmosphere

rising sea levels. (A.)

I think this is the answer.

1) the andrew carniage's purchase and renovation of skibo castle have been very good and auspicious for the local people of dornoch firth, scotland because this is a turistic attraction for many people who would want to know the castle, the local people would take advantage about this.

2) yes, it could.