Answer: a).
Currently attainable standards can be achieved under efficient operating conditions.
Explanation: currently attainable standards are standards which have been found to be achievable considering the current prevailing circumstances,this standards re usually set up for use in the short term it is not expected be achievable during the long term.
Currently achievable standards are always difficult to achieve but if resources are efficiently managed/ used it will be achieved. Currently achievable standards are usually set to evaluate performance especially in cost,time and materials management.
