Select which combination of the actions stated below

are all correct as examples of sustainability for businesses.

(1) 

Recycling and eliminating

waste.

(2) 

Saving costs by cutting

spending on safety equipment.

(3) 

Converting harmful gases into

clean energy.

(4) 

Approving salary increases only

for management and not for other employees.

(a)  Statements (1), (2) and (3)

(b)  Statements (1), (2) and (4)

(c)   Statements (1), (3) and (4)

(d)  Statements (1), and (3)