Use the map below to answer the following question: Map of Europe and North Africa labeled, Spread of Christianity. Dark green indicates Christian areas, 325 AD. The dark green areas are small, isolated patches surrounding the Mediterranean Sea. Light green indicates Christian areas added by 476 AD. Most of Spain, Gaul, Italy, Greece, and Asia Minor are light green. The light green extends to the European inland, and as far north as parts of Great Britain. It also extends to part of Egypt, Syria, and the North African Mediterranean coast. A grey line indicates the boundaries of the Roman Empire, 476 AD. This line extends around the Mediterranean, from North Africa in the south, beyond Jerusalem to the east, and into northern Gaul.
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Which statement can be said to be true, after examining this map?

By 476 AD, Christianity had spread to all of the boundaries of the Roman Empire.
By 476 AD, Christianity had extended far beyond all of the boundaries of the Roman Empire.
By 476 AD, Christianity had spread to most of the Roman Empire, and, in some cases, past those boundaries.
By 476 AD, Christianity had begun to decline within the boundaries of the Roman Empire.