I’m thinking it would be c sorry if it’s wrong .
        
                    
             
        
        
        
Answer:
minimum length of a surface crack is 15.043 mm
Explanation:
given data 
strain fracture toughness K = 78 MPa
tensile stress = 345 MPa
Y = 1.04
to find out
minimum length of a surface crack
solution
we find here length of critical interior flaw from formula that is 
α  =   ....................1
     ....................1
put here value we get 
α  =  
α  = 15.043 mm
so minimum length of a surface crack is 15.043 mm
 
        
             
        
        
        
Only put ciilant into ur radiator when the engine is cool (D)
 
        
             
        
        
        
Answer:
Paradox of Organizational Change: Engineering Organizations with Behavioral Systems Analysis. by. Maria E. Malott.
 
        
             
        
        
        
Answer:
Outdoors
Explanation:
Construction workers perform outdoors.