The accountant prepared the following variances for management to review:

$$3,500$ Favorable Price variance, $$2,500$ Unfavorable Quantity Variance, $$1,500$ Favorable Rate variance and $$2,000$ Unfavorable Efficiency Variarice.

The most likely explanation of the above variances is that:

$$ higher$-$quality raw materials were used than were planned

O employees worked more efficiently as expected to accomplish the job

O lower$-$quality raw materials were used than were planned which created problems

O the company may have assigned more experienced employees this month than originally planned