Final answer:
To see transgression in the stratigraphic record, you can identify a shift from coarse-grained to fine-grained sediments. Observing an increase in sediment grain size and noticing a decrease in fossil diversity can provide other information about the environment, but not directly about transgression. Finding an absence of unconformities does not necessarily indicate transgression.
Step-by-step explanation:
To see transgression in the stratigraphic record, you can identify a shift from coarse-grained to fine-grained sediments (option c). During transgression, sea level rises and deposits finer sediments farther inland. This shift in grain size can be observed in the stratigraphic record.
Options a, b, and d are not correct because they do not specifically relate to transgression in the stratigraphic record. Observing an increase in sediment grain size (option a) and noticing a decrease in fossil diversity (option b) can provide other information about the environment, but not directly about transgression. Finding an absence of unconformities (option d) does not necessarily indicate transgression, as unconformities can be present in transgressive sequences.