The correct answer is: D. All of the above.
A trademark is a sign that distinguishes the goods or services of one trader from those of another. A trademark can be a word, phrase, logo, symbol, design, or a combination of these elements. It can also be a shape of goods or a combination of colours.
To be registered as a trademark, a sign must be capable of distinguishing the goods or services of one trader from those of another. It must also be distinctive, which means that it must not be so similar to an existing trademark that it is likely to cause confusion among consumers.
Statement I is true because a trademark must be represented graphically in order to be registered. Statement II is true because a trademark must be capable of distinguishing the goods or services of one person from those of others. Statement III is true because a trademark may include shapes of goods or combinations of colours.
Therefore, all of the statements are true.