Rahim, a first$-$year auditor, is asked to select a sample of invoices to audit the utility expense account. Below is the account detail.

The audit program asks to select a sample of four items.

Month

Balance

Month

Balance

January

$$15,245$

July

$$2,901$

February

$12,973$

August

$2,837$

March

$11,359$

September

$3,690$

April

$9,326$

October

$5,890$

May

$6,380$

November

$9,823$

June

$4,558$

December

$14,906$

Which of the following months could be chosen if the auditor was using systematic selection or block selection? $($Several choices may be correct.$)$

$$ Systematic selection: May, June, July, August; Block selection: May, August, November, February $$ Systematic selection: January, March, September, October; Block selection: January, February, October, November $$ Systematic selection: May, August, November, February, August; Block selection: May, June, July, August $$ Systematic selection: May, June, November, December; Block selection: February, March, April, May $$ Systematic selection: March, June, September, December; Block selection: March, April, May, June