Michael promises to pay Buster $475 to install a bidet in Michael's bathroom. Buster completes the installation. The act of installing the bidet
a) imposes a moral obligation on Michacl to pay Buster.
b) imposes no obligation on Michael unless he is satisfied with the job.
c) is not sufficient consideration because it is not goods or money. d) is the consideration that creates Michael's obligation to pay Buster