Answer:
changed by an hour with every 15 of longitude
I would most certainly say that it is possible to use only credible sources. It is definitely in our best interest to always use credible sources, though it may not always be possible in some situations.
An imperative sencence D. makes a request, or actually a direct command.
An example of an imperative sentence is "Bring me the water now!", or another example: "Behave well!"
