Which two strategies should a developer use to avoid hitting governor limits when developing in a multi-tenant environment? (Choose two.)

Which two strategies should a developer use to avoid hitting governor limits when developing in a multi-tenant environment? (Choose two.)
A . Use collections to store all fields from a related object and not just minimally required fields.
B . Use methods from the “Limits” class to monitor governor limits.
C . Use SOQL for loops to iterate data retrieved from queries that return a high number of rows.
D . Use variables within Apex classes to store large amounts of data.

Answer: B,C