A standard which represents an efficient level of performance that is attainable under expected operating conditions is called a$($n$)$

a$.$ ideal standard.

b$.$ loose standard.

c$.$ tight standard.

d$.$ normal standard.

A total labor variance is analyzed in terms of

a$.$ rate $($price$)$ and hours $($quantity$)$ variances.

b$.$ buy and sell variances.

c$.$ quantity and quality variances.

d$.$ tight and loose variances.

The total materials variance is equal to the

a$.$ materials price variance.

b$.$ difference between the materials price variance and materials quantity variance.

c$.$ product of the materials price variance and the materials quantity variance.

d$.$ sum of the materials price variance and the materials quantity variance.

Labor efficiency is measured by the

a$.$ materials quantity variance.

b$.$ total labor variance.

c$.$ labor quantity $($hours$)$ variance.

d$.$ labor rate variance