Examine the description of the CUSTOMERS table: Which three statements will do an implicit conversion?

A: No implicit conversion; DATE is explicitly specified.

B: Implicit conversion happens here if customer_id is stored as a numeric type because '0001' is a

string.

C: TO_DATE is explicitly used, so no implicit conversion occurs here.

D: Implicit conversion from string '01-JAN-19' to DATE occurs because it's being compared directly to

insert_date which is of DATE type.

E: No implicit conversion is necessary if customer_id is numeric as '0001' matches type.

F: TO_CHAR function is used, which means an explicit conversion of numeric customer_id to string is

performed, so this is not implicit. Hence, this is incorrect regarding implicit conversion.

Each answer has been verified with reference to the official Oracle Database 12c SQL documentation,

ensuring accuracy and alignment with Oracle's specified functionalities.