he method a corporation uses to calculate estimated tax instalments$\_\_\_\_\_\_\_\_.$

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Part $1$

A$.$

is determined by the$$ CRA, who subsequently notifies the corporation

B$.$

can be selected by the corporation from allowable alternatives

C$.$

can be based on any reasonable method the corporation chooses as long as it does not result in an underpayment

D$.$

is prescribed within the Income Tax Act based on each$$ corporation's particular situation