Hi ,
1) According to me, answer should be A bcz risk has occured during execution and in execution there is a process called "implement Risk response" and also impact analysis should be conducted as part of PICC process which is after submitting the CR.
2)According to me, answer should be C bcz question states that this is an issue now (fixing issue will increase cost, scope and schedule)which should be analysed as part of PICC process.