Just need help to answer this one question

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Keenes Systems allocates manufacturing overhead based on machine hours. Each connector should require 8 machine hours. According to the static budget, Keenes expected to incur the following: 400 machine hours per month (50 connectors 8 machine hours per connector) $4,000 in variable manufacturing overhead costs $9,450 in fixed manufacturing overhead costs During August, Keenes actually used 600 machine hours to make 95 connectors and spent $5,700 in variable manufacturing costs and $6,400 in fixed manufacturing overhead costs. Keenes' standard variable manufacturing overhead allocation rate is O A. $10.00 per machine hour. O B. $33.63 per machine hour. OC. $23.63 per machine hour. OD. $6.67 per machine hour