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D. phoenicians
The Phoenician alphabet, called by convention the Proto-Canaanite alphabet for inscriptions older than around 1050 BC, is the oldest verified alphabet. The Phoenician alphabet is an abjad consisting of 22 letters, all consonants, with matres lectionis used for some vowels in certain late varieties. It was used for the writing of Phoenician, a Northern Semitic language, used by the civilization of Phoenicia.
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