According to the General Data Protection Regulation (GDPR), what is the definition of 'processing' of personal data?
选项：

A: any operation that can be performed on personal data
B: any operation that can be performed on personal data, except erasing and destroying
C: only operations in which the data is being shared on social media or transferred by email or otherwise through the Internet
D: only operations in which the personal data is used for the purposes for which it was collected