कार्य करने की सबसे सरल, आसान और त्वरित विधि की सचेत खोज को क्या कहा जाता है?

Which of the following statements is/are correct regarding a work curve? i. The initial upward rise of the work curve indicates a warm-up period. ii. The upward rise indicates steady production. iii. The upward rise indicates profit. iv. The upward rise indicates loss.

According to Marvin Mundel's classes of change in work simplification, which is the lowest class (Class 1) of change?