Question

Direct methods are useful when

(a) The system has a large number of variables and equations

(b) The system has a small number of variables and equations

(c) The system has sparseness in the coefficient matrix

(d) None of the above​

Answer 1

Answer:

The direct method of teaching, which is sometimes called the natural method, and is often (but not exclusively) used in teaching foreign languages, refrains from using the learners' native language and uses only the target language. ... In general, teaching focuses on the development of oral skills.

HOPE IT HELPS!!!