With the increase of lean and JIT popularity, the number of attempts to implement them has ...

With the increase of lean and JIT popularity, the number of attempts to implement them has increased. At the same time, a significant portion of these attempts have not been successful. Some of the well-known reasons for these failures are _____________ and ________________. Fill in the blanks correctly. (1). Relatively strong supplier power (2). Geographical dispersion of suppliers (3). Differences in national culture (4). The lack of information technology employed
 a. (1) and (4) c. (1) and (2)
  b. (3) and (4) d. (2) and (3)