Explanation/Reference:
The gdal_translate utility can be used to convert raster data between different formats, potentially performing some operations like subsettings, resampling, and rescaling pixels in the process.
Parameter -of format: Select the output format. The default is GeoTIFF (GTiff). Use the short format name.
Incorrect Answers:
A: There is no gdal command gdal_create.
B: There is no gdal command gdal_import.
C: The gdalwarp utility is an image mosaicing, reprojection and warping utility. The program can reproject to any supported projection, and can also apply GCPs stored with the image if the image is "raw" with control information.
gdal_translate converts raster data between different formats.
References: http://www.gdal.org/gdal_translate.html